You can simply rename it to d:\... , because otherwise, windows would be pointing to a non-existing folder (if you'd MOVE c:\program files to d:\program files).

But you should be carefull, first COPY program files to d:\ , then change the registry, reboot, try installing something (normally it should ask you to install in d:\program files\program) and then it's prety safe to delete c:\program files .

This post has been edited by wutske: Dec 8 2006, 06:50 AM